# Contributor: Rasmus Thomsen <oss@cogitri.dev>
# Contributor: Martell Malone <martell@marinelayer.io>
# Contributor: Travis Tilley <ttilley@gmail.com>
# Contributor: Mitch Tishmack <mitch.tishmack@gmail.com>
# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Contributor: Ariadne Conill <ariadne@dereferenced.org>
# Contributor: omni <omni+alpine@hack.org>
# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
_pkgname=llvm
pkgver=15.0.7
_majorver=${pkgver%%.*}
pkgname=$_pkgname$_majorver
pkgrel=14
pkgdesc="Low Level Virtual Machine compiler system, version $_majorver"
arch="all !loongarch64"
url="https://llvm.org/"
license="Apache-2.0"
install="$pkgname.pre-upgrade"
depends_dev="$pkgname=$pkgver-r$pkgrel libffi-dev zlib-dev zstd-dev"
# See https://gitlab.alpinelinux.org/alpine/aports/-/commit/51d2fba931fb2ef0046dea19405a9290c8735051#note_234651
[ -z "$BOOTSTRAP" ] && depends_dev="$depends_dev $pkgname-test-utils=$pkgver-r$pkgrel"
makedepends_host="$depends_dev binutils-dev libxml2-dev"
makedepends_build="cmake chrpath python3 py3-setuptools samurai"
# diffutils for diff: unrecognized option: strip-trailing-cr
# coreutils for 'od' binary
checkdepends="bash coreutils diffutils"
subpackages="$pkgname-static $pkgname-libs $pkgname-dev $pkgname-test-utils:_test_utils"
source="https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver/llvm-project-$pkgver.src.tar.xz
	0001-Disable-dynamic-lib-tests-for-musl-s-dlclose-is-noop.patch
	allocscore.patch
	fix-memory-mf_exec-on-aarch64.patch
	install-prefix.patch
	lfs64.patch
	llvm-stack-size.patch
	rust-feature-tables.patch
	"
builddir="$srcdir/$_pkgname-project-$pkgver.src"

# Whether is this package the default (latest) LLVM version.
_default_llvm="no"

# If crosscompiling, we need llvm-tblgen on the build machine.
if [ "$CBUILD" != "$CHOST" ]; then
	_llvm_tblgen="llvm-tblgen"
	if [ "$_default_llvm" = no ]; then
		_llvm_tblgen="llvm$_majorver-tblgen"
	fi
	makedepends_build="$makedepends_build cmd:$_llvm_tblgen"
	cmake_cross_options="
		-DCMAKE_CROSSCOMPILING=ON
		-DLLVM_TABLEGEN=/usr/bin/$_llvm_tblgen
	"
fi

if [ "$_default_llvm" = yes ]; then
	provides="llvm=$pkgver-r$pkgrel"
	replaces="llvm"
fi

# explicit override for previous version as well
replaces="llvm14"

# NOTE: It seems that there's no (sane) way how to change includedir, sharedir
# etc. separately, just the CMAKE_INSTALL_PREFIX. Standard CMake variables and
# even  LLVM-specific variables, that are related to these paths, actually
# don't work (in llvm 3.7).
#
# When building a software that depends on LLVM, utility llvm-config should be
# used to discover where is LLVM installed. It provides options to print
# path of bindir, includedir, and libdir separately, but in its source, all
# these paths are actually hard-coded against INSTALL_PREFIX. We can patch it
# and move paths manually, but I'm really not sure what it may break...
#
# Also note that we should *not* add version suffix to files in llvm bindir!
# It breaks build system of some software that depends on LLVM, because they
# don't expect these files to have a sufix.
#
# So, we install all the LLVM files into /usr/lib/llvm$_majorver.
# BTW, Fedora and Debian do the same thing.
#
_prefix="usr/lib/llvm$_majorver"

prepare() {
	default_prepare

	cd llvm

	# Known broken test on musl
	rm -v test/CodeGen/AArch64/wineh4.mir
	# https://github.com/llvm/llvm-project/issues/47657
	rm -v test/ExecutionEngine/Interpreter/intrinsics.ll

	case "$CARCH" in
	x86)
		rm -v test/Object/macho-invalid.test \
			test/tools/llvm-size/radix.test \
			unittests/Support/JSONTest.cpp
		sed -i "/JSONTest.cpp/d" \
			unittests/Support/CMakeLists.txt
		;;
	arm*)
		rm -v test/tools/llvm-readobj/ELF/dependent-libraries.test \
			test/Object/macho-invalid.test \
			test/tools/llvm-size/radix.test \
			test/tools/gold/X86/split-dwarf.ll \
			test/ExecutionEngine/frem.ll \
			test/tools/llvm-dwarfdump/X86/prettyprint_types.s \
			test/tools/llvm-dwarfdump/X86/simplified-template-names.s \
			unittests/ExecutionEngine/Orc/OrcCAPITest.cpp \
			test/CodeGen/RISCV/rv32zbp.ll \
			test/CodeGen/RISCV/rv64zbp.ll
		sed -i "/OrcCAPITest.cpp/d" \
			unittests/ExecutionEngine/Orc/CMakeLists.txt
		;;
	esac

	# Known broken codegen for Hexagon target, reported upstream.
	# https://github.com/llvm/llvm-project/issues/48936
	rm -v \
		test/CodeGen/Hexagon/csr-stubs-spill-threshold.ll \
		test/CodeGen/Hexagon/long-calls.ll \
		test/CodeGen/Hexagon/mlong-calls.ll \
		test/CodeGen/Hexagon/pic-regusage.ll \
		test/CodeGen/Hexagon/runtime-stkchk.ll \
		test/CodeGen/Hexagon/swp-memrefs-epilog.ll \
		test/CodeGen/Hexagon/vararg-formal.ll \
		test/tools/llvm-objcopy/MachO/universal-object.test \
		test/DebugInfo/X86/vla-multi.ll
	# XXX: fail when built with gcc13
	rm -v \
		test/CodeGen/X86/vector-interleaved-load-i32-stride-4.ll \
		test/Transforms/SampleProfile/pseudo-probe-update-2.ll \
		test/Transforms/SampleProfile/pseudo-probe-update.ll
}

build() {
	# Auto-detect it by guessing either.
	local ffi_include_dir="$(pkg-config --cflags-only-I libffi | sed 's|^-I||g')"

	# tries linking host libzstd in cross
	if [ -n "$BOOTSTRAP" ]; then
		local zstd=OFF
	else
		local zstd=ON
	fi

	# NOTE: DO NOT change CMAKE_BUILD_TYPE! Buildmodes like None will enable
	# debug assertions for LLVM!
	cmake -B build -G Ninja -Wno-dev -S llvm \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX=/$_prefix \
		-DCMAKE_INSTALL_RPATH=/$_prefix \
		\
		-DLLVM_DEFAULT_TARGET_TRIPLE="$CBUILD" \
		-DLLVM_HOST_TRIPLE="$CHOST" \
		\
		-DFFI_INCLUDE_DIR="$ffi_include_dir" \
		-DLLVM_APPEND_VC_REV=OFF \
		-DLLVM_BINUTILS_INCDIR=/usr/include \
		-DLLVM_BUILD_DOCS=OFF \
		-DLLVM_BUILD_EXAMPLES=OFF \
		-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON \
		-DLLVM_BUILD_LLVM_DYLIB=ON \
		-DLLVM_BUILD_TESTS="$(want_check && echo ON || echo OFF)" \
		-DLLVM_ENABLE_ASSERTIONS=OFF \
		-DLLVM_ENABLE_DUMP=ON \
		-DLLVM_ENABLE_EH=ON \
		-DLLVM_ENABLE_FFI=ON \
		-DLLVM_ENABLE_LIBCXX=OFF \
		-DLLVM_ENABLE_LIBEDIT=OFF \
		-DLLVM_ENABLE_PIC=ON \
		-DLLVM_ENABLE_RTTI=ON \
		-DLLVM_ENABLE_SPHINX=OFF \
		-DLLVM_ENABLE_TERMINFO=ON \
		-DLLVM_ENABLE_ZLIB=ON \
		-DLLVM_ENABLE_ZSTD=$zstd \
		-DLLVM_INCLUDE_BENCHMARKS=OFF \
		-DLLVM_INCLUDE_EXAMPLES=OFF \
		-DLLVM_INSTALL_UTILS=ON \
		-DLLVM_LINK_LLVM_DYLIB=ON \
		$cmake_cross_options

	cmake --build build

	python3 llvm/utils/lit/setup.py build
}

check() {
	LD_LIBRARY_PATH="$PWD/build/lib" \
	ninja -C build check-llvm
}

package() {
	DESTDIR="$pkgdir" cmake --install build

	cd "$pkgdir"/$_prefix

	# Symlink files from /usr/lib/llvm*/bin to /usr/bin.
	mkdir -p "$pkgdir"/usr/bin
	local name newname path
	for path in bin/*; do
		name=${path##*/}
		# Add version infix/suffix to the executable name.
		case "$name" in
			llvm-*) newname="llvm$_majorver-${name#llvm-}";;
			*) newname="$name$_majorver";;
		esac
		# If this package provides=llvm (i.e. it's the default/latest
		# llvm package), omit version infix/suffix.
		if [ "$_default_llvm" = yes ]; then
			newname=$name
		fi
		case "$name" in
			FileCheck | obj2yaml | yaml2obj) continue;;
		esac
		ln -s ../lib/llvm$_majorver/bin/$name "$pkgdir"/usr/bin/$newname
	done

	mkdir -p "$pkgdir"/usr/include "$pkgdir"/usr/lib/cmake

	# symlink include to /usr/include/llvm$_llvmver
	ln -sfv ../lib/$pkgname/include "$pkgdir"/usr/include/$pkgname

	# symlink cmake dir to system cmake
	ln -sfv ../$pkgname/lib/cmake/llvm "$pkgdir"/usr/lib/cmake/$pkgname
}

static() {
	pkgdesc="LLVM $_majorver static libraries"
	_common_subpkg

	_mv "$pkgdir"/$_prefix/lib/*.a "$subpkgdir"/$_prefix/lib/
}

libs() {
	pkgdesc="LLVM $_majorver runtime library"
	local soname="libLLVM-$_majorver.so"
	local soname2="libLLVM-$pkgver.so"

	mkdir -p "$subpkgdir"
	cd "$subpkgdir"

	# libLLVM should be in /usr/lib. This is needed for binaries that are
	# dynamically linked with libLLVM, so they can find it on default path.
	_mv "$pkgdir"/$_prefix/lib/$soname usr/lib/
	ln -s $soname usr/lib/$soname2

	# And also symlink it back to the LLVM prefix.
	mkdir -p $_prefix/lib
	ln -s ../../$soname $_prefix/lib/$soname
	ln -s ../../$soname $_prefix/lib/$soname2
}

dev() {
	_common_subpkg
	default_dev
	cd "$subpkgdir"

	amove \
		$_prefix/lib \
		$_prefix/bin/llvm-config

	# Move libLTO and LLVMgold back
	_mv "$subpkgdir"/$_prefix/lib/libLTO.so* \
		"$subpkgdir"/$_prefix/lib/LLVMgold* \
		"$pkgdir"/$_prefix/lib

	if [ "$_default_llvm" = yes ]; then
		ln -sf llvm$_majorver usr/lib/cmake/llvm
		ln -sf llvm$_majorver/lib/LLVMgold.so "$pkgdir"/usr/lib/
		ln -sf llvm$_majorver/lib/libLTO.so "$pkgdir"/usr/lib/
	fi

	# also add a suffix-version variant of llvm-config, as that's what things normally check for
	mkdir -p "$subpkgdir"/usr/bin/
	ln -sfv ../lib/llvm$_majorver/bin/llvm-config "$subpkgdir"/usr/bin/llvm-config-$_majorver
}

_test_utils() {
	pkgdesc="LLVM $_majorver utilities for executing LLVM and Clang style test suites"
	depends="python3"
	_common_subpkg

	local litver=$(python3 "$builddir"/llvm/utils/lit/setup.py --version 2>/dev/null \
		| sed 's/\.dev.*$//')
	test -n "$litver"
	provides="$provides lit=$litver-r$pkgrel"

	python3 "$builddir"/llvm/utils/lit/setup.py install --root="$subpkgdir"

	amove usr/lib/$pkgname/bin/FileCheck \
		usr/lib/$pkgname/bin/count \
		usr/lib/$pkgname/bin/not

	mv "$subpkgdir"/usr/bin/lit "$subpkgdir"/$_prefix/bin/lit
	ln -s lit "$subpkgdir"/$_prefix/bin/llvm-lit

	if [ "$_default_llvm" = yes ]; then
		amove usr/bin/count usr/bin/not
		ln -s /$_prefix/bin/lit "$subpkgdir"/usr/bin/lit
	else
		amove usr/bin/count$_majorver usr/bin/not$_majorver
	fi
}

_common_subpkg() {
	if [ "$_default_llvm" = yes ]; then
		replaces="llvm${subpkgname#"$pkgname"}"
		provides="$replaces=$pkgver-r$pkgrel"
	fi
}

_mv() {
	local dest; for dest; do true; done  # get last argument
	mkdir -p "$dest"
	mv "$@"
}

sha512sums="
4836d3603f32e8e54434cbfa8ef33d9d473ac5dc20ebf9c67132653c73f4524931abd1084655eaee5f20bcfcb91bcc4bbc5c4a0b603ad0c9029c556e14dc4c52  llvm-project-15.0.7.src.tar.xz
84ed6b165445d0cdb59daa59f612a7d960bf67b13a1b19bdd2a19d46548013e756faca6b8249cb6c60354f3a9aaef46652e5f531944c71294e46d2f7bfd8b832  0001-Disable-dynamic-lib-tests-for-musl-s-dlclose-is-noop.patch
ef63d5e01440cff65c10b84b65099bbd539bae72065d5581a8d2409cf2d0d4410d5bb3f501273ab29ee65bf8f5d23653a074428c2711ff9209324de56b857f3f  allocscore.patch
18a8270dec2c86e88dc2686de655f98c22fd26c71cd2d06d0de68029a1b363851a07b897694c5af0871805e2f59ecaab9363375e0223d27bbd04838462edf5c8  fix-memory-mf_exec-on-aarch64.patch
ebc0be314c129ef38f00c8c2be9d589658cae89ac8cda109e35933b5044e775a3d370c0c584d3e501e4d43167b8523d8c5e5a85653d8ebe853571697ae40fb35  install-prefix.patch
14439883c4967d99b496e6af9ad920afbeb9e12538ccc411329e7b39d319a216322f733f0d8511c4e2d7702015e5f552980bf586e95459cecf3c8cff5a245fd6  lfs64.patch
18668bc5ba056b6f0cc2ef28db1d1a7a60d2ff67e8a741cbd704aba510128e6564f70a1bbc3140562445e03a83169f6cdf0ee4a6adba1a5009a689a7a3bb6541  llvm-stack-size.patch
84d2cc5c0376d8a8a2bbc0891849c9421feaea5b38a329aecdb822c136f7ded7ab4c3b87838d8915e6eb54cfe89f3e88f3b81ae98733e9a58d935be74a3c456c  rust-feature-tables.patch
"
